Work holder for lapping devices



Nov. 14, 1944. A. M. DRAKE WORK HOLDER FOfi LAPPING nmixcms Filed June 24, 1942 l/VVf/VTO/P Y Hlaen/Il. Duke I47 TORIVEY' Patented Nov. 14, 1944 UNITED STATES PATENT oFFi-cE 2,362,543 worm HOLDER ron merino novices Alden Drake, West Hartford, Conn., assignor to Niles-Bement-Pond Company, West inert- :ford, Conn, aeorporation of New Jersey Application June 24, 194.2,Serial K014481278 (Cl. SL-218i 6 Claims.

This invention relates to gaze lapping devices and particularly to a holder adapted primarily for adjustable screw thread .gages of the ring type while being operated upon individually in a'lapping machine.

More specifically the invention relates to and is shown and described in connection with a holder for screw thread gages of the split ring typehaving'an adjusting screw and locking nut therefor extending co-axially through the gage and by means of which the pitch diameter of the gage may be slightly varied.

An object of the present invention is to provide a holder for an adjustable dimension .gage of the split ring type enabling the gage to be adjusted while mounted in the holder and while being oscillated during thejlapping operation.

One feature that enables me to accomplish the above named object is that the holder provides means for mounting the gage in fixed position therein and has rotatably mounted members housedtherein adapted to enter slots in theadjusting screw and locking nut provided in the gageandby means or which'the gage is adjusted.

A further object of the invention is to provide means for quickly disengaging the adjusting members in "the holder from the gage adjusting members, these disengaging means also permit- .3 'is a transverse or endview partlyin section taken upon the broken line 3-3 of Fig.2.

. In the above-mentioned drawing there has been hown'but one embodiment of the invention which is now deemed preferable.,'but it is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly and in its preferred aspect, the invention may include the following principal parts: First, a body member preferably having proje'cti'ons outstanding therefrom adapted to engage the openings provided .lnlall ad'justabiering type gage and retain a gage thereon; second, rotatable members symmetrically disposed on either side of the holder and having their inner or adjacent ends formed to enter and en age slots ting prompt re-engagement of the adjusting tion and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specification, I have shown the invention embodied in a holder for split ring gages for external screw threads but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Figure 1 is a front elevation of the improved holder showing a standard form of screw thread gage mounted therein, parts being broken away to more clearly show their construction.

Fig. 2 is an enlarged view, partly in section, of a gage showing the adjacent portions of the adjusting means within the holder in engagement with the adjusting screw and locking nut for the gage, and

provided in the adjusting screw and lock nut for the gage; third, levers 'pi'vot'ally mounted within the body member or the holder and adapted at their lower ends to engage'the rotating members for adjusting the diameter of the gage; and fourth, a projection or arm extending radially from the body member by means of which the gage and its. holder may be oscillated or otherwise actuated while being operated upon within a lapping machine.

Referring more in detail to the figures of the drawingli provide a body member 10 having a recess formedtherein adapted to fit the periphery of a ring gage W to be lapped. Extending from this body member III are projections or studs H outstanding from the body member In and adapted to engage within the recesses or openings l2 of the gage.

The holder forming the present invention and illustrated in the drawing is adapted primarily for retaining adjustable or split ring gages either plain or screw threaded while being operated upon in the lapping machine such as shown and described in my copending application Serial No. 420,637, filed November 27, 1941, for a Screw thread lapping machine and which is now Patent No. 2,335,745, patented November 30, 1943.

Extending in alinement with each other and disposed on opposite sides of the recess in the ber l0 and normally pressed toward their engaging positions by suitable springs l8. To retain the sleeves l1 in position threaded members I 9 through which the sleeve may freely pass are threaded into the outer ends of these recesses.

Heads 20 formed on the inner ends of the sleeve and heads 2| on the rotatable members 13 prevent removal of these member from' their recesses. 1

In order to disengage the rotatablemembers l3 from engagement with the adjusting means I4 said body member.

in said gage for adjusting the size of said gage while supported within said body member, and means to disengage said rotatable member from engagement with said adjusting screw.

2. A gage holder for gage lapping machines comprising in combination, a body member, means to support a gage in fixed position thereon, and rotatable members mounted in said body member for engagement with adjusting an locking members on said gage for adjusting th diameter of said gage While supported withi 3. A gage holder for gage lapping machines comprising in combination, a body member,

and l 5 for the gage W-levers 22 are provided pivotally mounted within the body member ID and having their inner ends adapted to contact the inner surface of the heads 2| formed on the rotatable members'IB. The outer or free ends of these levers'22' are shaped as handles so that they 'may be grasped to simultaneously withdraw the rotatable members I3 from engagement with the adjusting members I4 and [5 for the gage.

To position a gage W within the holder ID the rotatable members l3 are held in their retracted positions by means of the levers 22 and the gage W placed within the recess within the holder and engaging the projecting studs I l on the body member ID with the openings I2 ,in the gage. By releasing the lever 22 and then rotating the members 13 slightly their ends may be positioned within the slots 'of the adjusting screw [4 and its locking nut I5. During the lapping operation the holder and its gage are oscillated by means of the radial arm 23 actuated by the mechanism shown in the above referred to copending application. During this operation the rotatable members l3 may be manually adjusted to slightly varythe size of thegaging surface to maintain this surface in effective lapping engagement with the lap.

What I claim is:

1. A gage'holder for gage lapping machines comprising in combination, a body member, means to support a gage in fixed position thereon, a rotatable member mounted in said body member adapted to engage an adjusting screw means to support a gage in fixed position thereon, rotatable members mounted in said body member for engagement with the adjusting and locking members on said gage for adjusting said gage while supported within said body member, and means to disengage said rotatable members from said adjusting means.

4. A gage holder for gage lapping machines comprising in combination, a body member, an actuating arm extending therefrom, means to support a gage having a size adjusting member in fixed position thereon, means mounted in said body member for engaging the adjusting member in the gage being lapped while supported within said body member, and means to directly withdraw said' means from said adjusting members.

5. A gage holder for gage lapping machines comprising in combination, a body member, means to support a gage in fixed position thereon, members mounted for slidable and rotary movement in said body member and adapted to engage and rotate adjusting and locking screws in the gage being lapped for manually adjusting said gage while supported within-said body member, and means to disengage said members from the gage adjusting and locking screws. 6. A gage holder and adjusting member comprising in combination, a'body member, means to support an adjustable'gage being lapped in position thereon, and means rotatably and slidably mounted in said body member adapted to engage and actuate. size adjusting members within said gage.

ALDEN M. DRAKE. 

